If iPXE boot failed, then make sure the 'reboot' action is really
executed. The problem with 'prompt --timeout...' is that this command
will fail if no key is pressed. However, iPXE exits immediately if
one of the command fails so the 'reboot' action was never executed and
the node was stuck in the following unbootable state.
boot.ipxe : 395 bytes [script]
/pxelinux.cfg/52-54-00-23-e4-c2... No such file or directory (http://ipxe.org/2d0c613b)
/pxelinux.cfg/default... ok
Configuring (net0 52:54:00:23:e4:c2).................. Error 0x040ee119 (http://ipxe.org/040ee119)
Could not boot: Error 0x040ee119 (http://ipxe.org/040ee119)
PXE boot failed. No configuration found for MAC 52:54:00:23:e4:c2
Press any key to reboot...
Could not boot image: Connection timed out (http://ipxe.org/4c22e035)
No more network devices
Change-Id: If4b2bab25bcfe8da0a64ee9cc1659580aec9776a
69486c4f58